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| Description: The intersection of two classes is a subset of one of them. Part of Exercise 12 of [TakeutiZaring] p. 18. |
| Ref | Expression |
|---|---|
| inss1 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elin 2207 |
. . 3
| |
| 2 | 1 | pm3.26bi 322 |
. 2
|
| 3 | 2 | ssriv 2069 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: inss2 2231 ssin 2232 ssinss1 2237 unabs 2238 nssinpss 2240 dfin4 2248 inv1 2299 difdisj 2337 wefrc 2943 ordtri3or 2979 onfr 2986 relin1 3262 resss 3383 cnvcnvss 3488 funimass2 3573 fnresin1 3601 ssimaex 3768 sbthlem7 4453 zfregs 4647 brdom3 4801 brdom5 4802 brdom4 4803 imadomg 4806 tgval2t 7617 unitgt 7623 cnsscnp 7772 bcthlem14 8012 bcthlem16 8014 phnv 8473 minveceu 8583 minvecle 8586 chm1 9379 chdmm1 9400 chabs1t 9439 chabs2t 9440 ledi 9459 lejdi 9461 pjoml4 9530 cmbr3 9543 cmbr4 9544 cmm1 9549 osumcor2 9590 3oalem4 9610 pjssm 9626 pjocin 9643 pjin 9644 mayete3 9673 riesz4t 9997 riesz1t 9998 cnlnadjeu 10010 cnlnadjeut 10011 cnlnssadj 10013 nmopadjle 10021 pjin1 10120 pjclem1 10123 stji1 10169 stm1 10170 dmdbr2 10230 ssmd1 10238 mdslj2 10247 mdsl2b 10250 mdslmd1lem1 10252 mdslmd2 10257 atoml 10309 atcvat4 10324 sumdmdlem2 10346 dmdbr5at 10349 dmdbr6at 10350 dmdbr7at 10351 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 962 ax-gen 963 ax-8 964 ax-10 966 ax-12 968 ax-17 971 ax-4 973 ax-5o 975 ax-6o 978 ax-9o 1123 ax-10o 1140 ax-16 1210 ax-11o 1218 ax-ext 1459 |
| This theorem depends on definitions: df-bi 147 df-an 225 df-ex 981 df-sb 1172 df-clab 1464 df-cleq 1469 df-clel 1472 df-v 1812 df-in 2051 df-ss 2053 |